When an RPython class is instantiated via an indirect call (that is, which
class is being instantiated isn’t known precisely) allow the optimizer to have
more precise information about which functions can be called. Needed for Topaz.

Make PyPy respect PYTHONINSPECT variable set via os.putenv in the same process
to start interactive prompt when the script execution finishes. This adds
new __pypy__.os.real_getenv call that bypasses Python cache and looksup env
in the underlying OS. Translatorshell now works on PyPy.

Implement much of numpy’s c api in cpyext, allows (slow) access to ndarray
from c

Added an abstraction for functions with a fast and slow path in the JIT. This
speeds up list.append() and list.pop().

Constant-fold reading out of constant tuples in PyPy.

No longer delegate numpy string methods to space.StringObject, in numpy
this works by kind of by accident. Support for merging the refactor-str-types
branch

Remove the “type system” abstraction, now that there is only ever one kind of
type system used.

Kills gen_store_back_in_virtualizable - should improve non-inlined calls by
a bit

Work on improving UnionError messages and stack trace displays.

More improvements and refactorings of error messages.

Unbreak tests in rlib.

Use subclasses of SpaceOperation instead of SpaceOperator objects.
Random cleanups in flowspace.

make open() and friends rpython

Added the new incminimark GC which performs GC in incremental steps

fastpath for cffi.new(“long[]”)

remove a pointless abstraction

Allow the jit to continue running when sys.settrace() is active, necessary to
make coverage.py fast

Remove lib_pypy/numpypy in favor of external numpy fork

Tweak the jit counters: decay them at minor collection (actually
only every 32 minor collection is enough). Should avoid the “memory
leaks” observed in long-running processes, actually created by the
jit compiling more and more rarely executed paths.

Fixed the usage of sys.settrace() with the JIT. Also made it so using
sys.settrace() doesn’t cause the GIL to be released on every single iteration.